When Numbers Don't Match (IMAGE)

Bocconi University

When Numbers Don't Match

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Sex ratio is a key parameter of a population. It has to be kept near its equilibrium as a skewed ratio is bound to have potentially very negative impacts on societies in terms, among other things, of criminality and economic development. And even when the sex ratio looks normal at national level, this might not apply at local level within a country nor for all age groups.

There are three possible reasons behind a locally skewed sex ratio. The first is an abnormal prevalence at birth, reflecting gender-selective abortions, the second is higher survival rates for one gender compared with the other, and the third is gender-specific migration.

Michał Gulczyński, “Migration and Skewed Subnational Sex Ratios among Young Adults”, Population and Development Review, first published 12 July 2023, https://doi.org/10.1111/padr.12577

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Weiwei Chen, Bocconi University

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